Thanks buddy, got your PM.
Glad you found the leak and it's pretty simple.

The side bearings are ridiculously expensive. This kit is 310 euros, which is like $500 CAD.

This was the original bearing
https://www.bearings-online.co.uk/it...f-Bearing.html

This is the new version that you mentioned
https://www.123bearing.com/bearing-h...587739-tr1-fag

This is stupid expensive lol.

Found the kit on ebay as well.
https://www.ebay.ca/itm/143786832897...mis&media=COPY

These rear diffs are pretty much bulletproof. I will just grab a used diff for $70 locally and use the bearings from it.

Looking forward to see your experience with driving this thing once you put it back together!